PERNAMBUCO, BRAZIL- Medical specialists work in a Covid-19 diagnostic laboratory in Pernambuco, Brazil on June 30, 2020. The World Health Organization noted that the ChAdOx1 nCoV-19 vaccine, produced by the University of Oxford in association with the AstraZeneca laboratory, it is the most advanced in the world in terms of development. She indicated that she is leading the race for a coronavirus immunizer. The formula is being tested in Brazil and South Africa after successful trials in the UK.